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Horizontal End Suction Pump for Chemical Process, ASME B73.1-2001
Installation, Operation, and Maintenance Manual – CPP21
• The pump may only be operated under the minimum operating range for short
periods. The minimum pump flow is given in the characteristic line.
7.4 DOWELING (OPTIONAL)
When the pump has reached operating temperature and pressure,
1. Stop pump.
2. Check alignment and reset the equipment, if required.
3. Dowel the pump.
4. Dowel the driver.
5. Start the pump as defined in
SECTION 7.2-STARTUP.
7.5 STOPPING
1. Throttle pump discharge to minimum flow.
• Warning: do not close suction valve, this will cause the pump to run dry.
2. Turn the power off to the driver.
3. Close the pump discharge valve
4. Observe the run - down of the pump until full stop.
• If the rotor is jerky or suddenly stops, there is a danger that the rotor has
become blocked. The pump must be opened and all running clearances
checked.
5. Close the suction valve when the pump shaft stops rotating as the pump must be isolated before
examination and made safe.
• Do not close the suction valve until the pump has come to a full stop, as it may
cause the pump to run dry.
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